Thanks for the links Arcticap. I read all the links except for the first one which wouldn't open. There are exploded schematics, but nothing in the way of explanation of how the harmonica bar advances. But thanks for your effort and trying anyway, appreciate it.

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"This is my Remy and this is my Colt. Remy loads easy and topstrap strong, Colt balances better and never feels wrong. A repro black powder revolver gun, they smoke and shoot lead and give me much fun. I can't figure out which one I like better, they're both fine revolvers that fit in my leather".
"To be sure of hitting the target, shoot first and call whatever you hit the target".